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HomeScaleAircraftHelicopterScale Model RC Helicopters Docs  NAZA-H Install and Flight Test
03-07-2013 10:41 PM  5 years agoPost 41
Joel Rosenzweig

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Marlborough, MA - USA

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Those instructions are best for 3D machines but don't really apply to scale helis, because of our different pitch curves.

What I do, is to setup the travel for the collective channel to the normal limits of throw. For JR, this is -100 to + 100. I then set my servo arms at 90 degrees to the servo's when the collective stick is at half stick. And then I make the pushrods from the servos to the swash plate the correct length so that the swash plate sits at the correct height and won't bind at extremes of throw. And then I make my pushrods from the swash plate to the rotor head the correct length so that I have my 5.5 degrees when the collective stick is at center.

Now calibrate your radio to the Naza.

Finish Naza setup.

Go back and check your pitch curves, low, mid, high. Verify that mid stick is your desired hover pitch, i.e. 5-6 degrees. If it is not correct, make the adjustment either with the pushrods if that's easy, or through the radio pitch curve, whichever you like best.

If you adjust the mid stick position of your pitch curve, then you would also need to adjust your pitch curve for high and low pitch. If you adjust your pitch curve high and low pitch, then you must recalibrate the NAZA so that it knows what the range of motion for that channel is. This is really important. Naza doesn't really care what your pitch range is. But it does need to know what mid-stick is so that it interprets the stick correctly in ATTI and ATTI+GPS modes. If you don't recalibrate, you will be in for a big surprise when you switch modes. The heli could rise or fall, depending on how you had to adjust your pitch curve at center stick.

Points to keep in mind:

Make your life easy by getting the mechanical setup as close as possible before you setup Naza.

Setup Naza, and check your pitch curves again when you're done. Recalibrate your sticks if necessary!

That's it..

Joel

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03-07-2013 11:06 PM  5 years agoPost 42
2tall

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Crystal Lake, Illinois, USA

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...Now calibrate your radio to the Naza...
So after establishing the mechanical settings that you mentioned (5-6 degrees at 50% collective) my JR linear curve at 50% should still read 50% in and 50% out but the actual measured pitch should be between 5 and 6 degrees? Then, proceed with the Naza setup? I assume then that when the Naza setup instructions are calling for zero degrees I should actually be measuring the 5-6 positive?

When I move on to the cyclic deflection step should I still be able to to see a gain of 6 degrees, or so - so a total of 11-12 degrees?

Jon

"Pay attention...lest the ground rise up and smite thee."

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03-07-2013 11:15 PM  5 years agoPost 43
Joel Rosenzweig

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Marlborough, MA - USA

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but the actual measured pitch should be between 5 and 6 degrees?
Yes.
Then, proceed with the Naza setup? I assume then that when the Naza instructions are calling for zero degrees I should actually be measuring the 5-6 positive?
Yes.

As I indicated, their setup really only applies to 3D. You need to make some adjustments for scale helis, because our pitch curves are different.

This is true of all the FBL controllers. For example, Skookum tells you to setup the pitch curve as if you are setting up a 3D heli, but it makes no sense to do it that way when flying scale pitch curves. But, since the majority of pilots in our hobby are 3D flyers, their instructions are correct for the overwhelming majority of the market.

Anyway, you asked a great question, and hopefully the answer makes sense to you now.
When I move on to the collective deflection step should I still be able to to see a gain of 6 degrees at mid stick - so a total of 11-12 degrees?
I found that I wanted more like 5 degrees here. The gain of the system was too high when I had it at the recommended levels, which I think are 8 degrees.

Joel

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03-07-2013 11:22 PM  5 years agoPost 44
2tall

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Crystal Lake, Illinois, USA

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Thanks Joel, can I conclude from this that the TX pitch curves for flight modes Normal, 1, 2, and Throttle Hold should all be 0-100% and linear, or in effect, just set the Normal to linear and don not use the others?

"Pay attention...lest the ground rise up and smite thee."

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03-08-2013 02:45 AM  5 years agoPost 45
Joel Rosenzweig

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Marlborough, MA - USA

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My preference is to use just one flight mode, but you can set it up with multiple flight modes if you wish. That said, you must be mindful of the way that Naza interprets your stick position. So it would make sense that you use alternative pitch curves for manual mode, if that's what you want, but you would be overly complicating the setup to use alternative pitch curves for ATTI and ATTI+GPS modes. It's not that you can't use them in those modes, but if you contemplate how that alternate pitch curve would be used in those modes, you might see that they have no value there, and would only serve to cause a problem.

So the summary is: if you really want more than one flight mode, it's best to switch to those in your manual modes, and switch out of them if you enter the ATTI or ATT+GPS modes.

Joel

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03-08-2013 03:03 AM  5 years agoPost 46
2tall

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Crystal Lake, Illinois, USA

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I understand Joel - thanks again. I'm inclined to use the traditional TX flight mode switching for governed "Set RPM" head speed changes only, keeping the pitch curves the same in all modes. Even that RPM mode selection would be done in NAZA manual mode before entering hover.

Jon

"Pay attention...lest the ground rise up and smite thee."

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03-08-2013 03:05 AM  5 years agoPost 47
Joel Rosenzweig

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Marlborough, MA - USA

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Understood, Jon. You will be just fine with that.

Joel

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03-08-2013 04:17 PM  5 years agoPost 48
coptercptn

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Mesa AZ. USA

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good info... Jon you can come over and help with the Cobra?...

Home of the "Sea Cobra".....

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03-08-2013 07:33 PM  5 years agoPost 49
2tall

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Crystal Lake, Illinois, USA

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...can come over and help with the Cobra?...
Jim - So the Cobra is now on the bench? Pics please (new thread?). BTW the 500 looks great.

I'd be happy to help with the Cobra but I'm sure no NAZA-H expert. I have not tested mine in flight so for now the extent of my success is sitting on the bench where it cant hurt itself. .

"Pay attention...lest the ground rise up and smite thee."

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03-15-2013 06:05 PM  5 years agoPost 50
rjpmodel1

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Cedar Park,TX,USA

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First of all I would like to thank Joel for all the advice he has given me over the phone about the setup and all the parameters and how they affect the flying. THANK YOU Joel. I have now flown my Trex600 with NazaH and GPS and WOW I love it. fairly easy to setup once you have gone through it several times. I have the flybarless cyclic rates set down to 80 to make it tame and I have 40% expo in the TX. I have the cyclic step measurement which is really a measurement of mechanical gain set at 6deg. It hovers in place with my hands in my pockets. I love it.
I have my Vario Benzin pod and boom and Big Jet Ranger all set up and ready to fly with NazaH/GPS which I will do at Cagen Helifest next week. I also will do a maiden on my MZ BO105 with NazaH that I have recently finished(only in white gell coat so far) at Cagun Helifest.
Bob Price

Bob Price

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03-17-2013 06:01 AM  5 years agoPost 51
Sidneyw

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Huntersville, NC

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Joel, hope won't mind me posting this video.

Watch at YouTube

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03-18-2013 02:35 AM  5 years agoPost 52
jmiles3830

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orlando fl. orange

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hello joel like the video of you heli i am building a bell 429 from rca my question is can i mount my gps on the tail boom inside the fuse

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03-18-2013 02:56 AM  5 years agoPost 53
Joel Rosenzweig

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Marlborough, MA - USA

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If you can fit it there, then you can use it there. Make sure it's not sitting behind any metal. On top of metal, like on top of the tail boom, if it has one, is fine.

I mounted the GPS in the tail section of my Air Crane, and mounted the GPS in the cockpit section of my Lama. As long as it can see satellites, it will be fine.

Joel

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03-18-2013 03:41 AM  5 years agoPost 54
jmiles3830

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orlando fl. orange

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thanks is it ok if you have an aluminum tail boom

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03-18-2013 03:47 AM  5 years agoPost 55
jmiles3830

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orlando fl. orange

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also when measuring the distance for the controler and the gps does it have to be measured prefect,and what will happen if you don't measure it prefect

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03-18-2013 03:56 AM  5 years agoPost 56
jmiles3830

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orlando fl. orange

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will i know if it can see satellites

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03-29-2013 10:24 PM  5 years agoPost 57
2tall

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Crystal Lake, Illinois, USA

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Ran a test flight today
The weather here finally cooperated and I was able run two test flights with the E-Mongoose and Naza-H. Normal and ATT modes were impressive. I did not try GPS mode, as I'm getting the multi-color rapid error blinking when I switch to GPS.

The power up initialization LED sequence is normal, ending in four green blinks. In both normal and ATT modes the system LED indicates more than six observed satellites. (Totally off in normal mode and blinking yellow in ATT mode) When I switch to GPS mode the initialization error sequence begins and continues.

Note: It worked fine on the bench after set-up, and at Cajun Heli Fest. I only tried flying in normal mode at the Heli Fest, but the GPS switch position tested fine on the ground there - blinking green.

Back to today's flights -- In normal mode the ship flew really well. I have the Naza gains and response ranges tuned down per all the advice here on RR. I also use 35% Expo on aileron/elevator and 25% on rudder (needs a bit more there). When I switched to ATT mode the transition was glitch free and the ship was a dream to fly. I did hold my breath the first time, and my finger war triggered for a quick switch back to Normal mode - totally not necessary. Wish I could have tried GPS mode - need to sort that out. I'll be running through the setup routine again this evening to see if it just needs a refresh.

Jon

Added a few hours later: Last evening I powered the system to begin running through the Naza set-up, and the system LED response was normal in all modes. I'm not sure why the GPS mode did not want to work at the club field, but all seems well now.

J

"Pay attention...lest the ground rise up and smite thee."

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04-06-2013 01:48 PM  5 years agoPost 58
HS10

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Elk River, MN

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Switching modes in flight
Hi Folks

I have installed my NAZA-H and conducted several test flights in "manual" mode.

I notice that the helicopter will rapidly gain or lose altitude when switching back to manual mode.

What is the best technique to ensure no altitude changes occurs when switching back to manual mode?

Thanks

Logo 14/24 (Agusta 109A-MKII) (MH-6 Little Bird) (OH-58A) Navy - Retired

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04-20-2013 05:37 AM  5 years agoPost 59
rjpmodel1

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Cedar Park,TX,USA

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Hi HS10. Adjust your pitch curves to hover at mid stick in normal mode. This will solve your problem.
I now have the NazaH/GPS flying on 4 helis. Trex 600, Vario Benzin pod and boom, Vario Big jet Ranger, and MZ BO105 with Benzin mechanics also. All electric.
Bob.

Bob Price

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04-20-2013 05:43 AM  5 years agoPost 60
Joel Rosenzweig

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Marlborough, MA - USA

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Just remember to recalibrate your NAZA TX inputs after you adjust your pitch curves. If you end up changing the hover pitch by adjusting the curve, then you will need to teach NAZA where center stick is, again, so that it can properly interpret the collective stick.

Joel

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HomeScaleAircraftHelicopterScale Model RC Helicopters Docs  NAZA-H Install and Flight Test
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